Where to publish a first article in Deep Reinforcement Learning?
I recommend you focus on quality over quantity. Publishing a paper will boost your reputation and make you more recognised within your academic field (AI); however, this is only if the paper provides useful insights into an important issue.
Your paper is more likely to be accepted if it is well written and easy to understand, stimulates new important questions, uses rigorous methods to explain why the data supports the conclusion and connections to prior work is made and serve to make your paper's arguments clear. (Elizabeth Z Elsevier blog)
Before submitting your paper, ask a mentor or a colleague to proofread it, so that you can make the relevant revisions and changes. Journal editors will look down on your work if it is poorly written or contains substandard grammar.
A way to get published is by writing reviews, especially for researchers in earlier stages of their careers. Most journal editors like to publish replies to previous publications since it stimulates debate.
Remember it is acceptable to challenge reviewers' suggestions with good justification. Many researchers fail to persevere when they are instructed to revise and resubmit their work. Don't give up, however, you can politely decline or even argue why a reviewer is wrong. Editors will accept a rational explanation if it is clear that you have considered all their feedback.
Getting published is never easy, especially in high ranking journals. If you focus on getting published quickly it could derail you from concentrating on the quality of your research. Yes, getting published can be expensive, however, it's much better for your career if you write a high-quality paper than a low-quality paper in a lowly ranked or ungraded journal since it will not be REFable.
Below is a list of Artificial Intelligence Journals that you can submit your papers to and possibly get published.

Artificial Intelligence (Journal) https://www.journals.elsevier.com/artificial-intelligence

Artificial Intelligence Review  https://link.springer.com/journal/10462

Applied Artificial Intelligence http://www.tandfonline.com/action/journalInformation?journalCode=uaai20&amp;

Autonomous Agents and Multi-Agent Systems  https://www.springer.com/computer/ai/journal/10458

International Journal on Artificial Intelligence Tools http://www.worldscientific.com/worldscinet/ijait

International Journal of Pattern Recognition and Artificial Intelligence http://www.worldscientific.com/worldscinet/ijprai

Journal of Experimental and Theoretical Artificial Intelligence  http://www.tandfonline.com/action/journalInformation?journalCode=teta20

Journal of Machine Learning Research  http://www.jmlr.org/

IEEE Intelligent Systems  http://publications.computer.org/intelligent-systems/

Journal of Automated Reasoning  https://www.springer.com/computer/theoretical+computer+science/journal/10817

Minds and Machines  https://www.springer.com/computer/ai/journal/11023

Autonomous Agents and Multi-Agent Systems  https://www.springer.com/computer/ai/journal/10458

Applied Intelligence  https://link.springer.com/journal/10489

Journal of Intelligent Manufacturing  https://link.springer.com/journal/10845

Journal of Intelligent Information Systems   https://link.springer.com/journal/10844

AI &amp; Society  https://link.springer.com/journal/146